C1235

CIRCUIT DESCRIPTION
The Wheel Speed Sensor (WSS) a single point magnetic pickup that produces an AC signal. The Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) uses the signal frequency in order to calculate the wheel speed.

CONDITIONS FOR SETTING THE DTC
The ignition is in the RUN position and the EBCM/EBTCM senses an open, a short to ground, or a short to battery in the RR WSS circuit

ACTION TAKEN WHEN THE DTC SETS
^ A DTC C12,35 is stored
^ The ABS/TCS is disabled
^ The ABS and the TRACTION OFF indicators are turned on

CONDITIONS FOR CLEARING THE DTC
^ The condition for the Diagnostic Trouble Code (DTC) is no longer present and the scan tool clear DTC function is used
^ 50 ignition cycles have passed with no DTCs detected

DIAGNOSTIC AIDS
^ Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction.
^ The following conditions may cause an intermittent malfunction:
- Poor connections
- Broken insulation
- A broken wire inside the insulation
^ If an intermittent malfunction exists, refer to Troubleshooting Procedures.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. Checks for an open in the WSS or WSS CKT.
12. Checks for a short to ground in the WSS or WSS CKT.
19. Checks for a short to voltage in the WSS CKT.
21. Checks for a short to voltage in the WSS CKT.